package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
   @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     *
     * 新增菜品和口味
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO){
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入数据
        dishMapper.insert(dish);
        //获取当前菜品id
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavor=dishDTO.getFlavors();
        if(flavor!=null&&flavor.size()>0){
            //遍历dishflavor集合
            for (DishFlavor dishFlavor:flavor){
                dishFlavor.setDishId(dishId);
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavor);
        }

    }

    /**
     *  菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     *  批量删除菜品
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够以删除，是否存在起售中的菜品
        for (Long id:ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断房前菜品是否能够删除---菜品是否呗套餐关联了
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
         for (Long id:ids){
//             dishMapper.deleteById(id);
//             //删除菜品关联的口味数据
//             dishFlavorMapper.deleteByDishId(id);
             //根据菜品id集合批量删除菜品数据
             dishMapper.deleteByIds(ids);
             //根据菜品id集合批量删除关联的口味数据
             dishFlavorMapper.deleteByDishIds(ids);
         }
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品信息；
        Dish dish = dishMapper.getById(id);
        //根据菜品id来查询口味信息
         List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装带vo
         DishVO dishVO=new DishVO();
         BeanUtils.copyProperties(dish,dishVO);
         dishVO.setFlavors(flavors);
        return dishVO;
    }

    @Override
    public Result update(DishDTO dishDTO) {
        return null;
    }
}
